Methods and apparatuses for video processing include: filtering a luma sample using a first filter in a video coding process, the first filter being represented as a cross shape; filtering a chroma sample associated with the luma sample using a second filter in the video coding process; determining, based on the filtered luma sample, a residual correction value corresponding to the chroma sample; and determining a corrected chroma sample based on the residual correction value and the filtered chroma sample.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The non-transitory computer-readable medium of claim 1, wherein the first filter is one of an 8-tap 5×4 cross-shape loop filter, a 9-tap 5×5 cross-shape loop filter, a 13-tap 7×7 cross-shape loop filter, a 7-tap 5×3 cross-shape loop filter, a 7-tap 3×5 cross-shape loop filter, or a 17-tap 9×9 cross-shape loop filter.
5. The non-transitory computer-readable medium of claim 4, wherein the non-cross-shape filter is an 8-tap hexagon-shape loop filter, and the first filter is one of a 7-tap 5×3 cross-shape loop filter or an 8-tap 5×4 cross-shape loop filter.
6. The non-transitory computer-readable medium of claim 1, wherein a shifting parameter value of the first filter is the same as a shifting parameter value of the second filter.
7. The non-transitory computer-readable medium of claim 6, wherein the shifting parameter value of the first filter is 10.
8. The non-transitory computer-readable medium of claim 6, wherein the first filter comprises N first clipping operation, the second filter comprises N second clipping operation, and N is an integer greater than or equal to one.
9. The non-transitory computer-readable medium of claim 1, wherein the first filter comprises N first clipping operation, the second filter comprises N second clipping operation, and N is an integer greater than or equal to one.
10. The non-transitory computer-readable medium of claim 9, wherein N is equal to one.
11. The non-transitory computer-readable medium of claim 1, wherein the first filter is a cross component adaptive loop filter (CCALF), and the second filter is an adaptive loop filter (ALF).
13. The apparatus of claim 12, wherein the first filter is one of an 8-tap 5×4 cross-shape loop filter, a 9-tap 5×5 cross-shape loop filter, a 13-tap 7×7 cross-shape loop filter, a 7-tap 5×3 cross-shape loop filter, a 7-tap 3×5 cross-shape loop filter, or a 17-tap 9×9 cross-shape loop filter.
16. The apparatus of claim 15, wherein the non-cross-shape filter is an 8-tap hexagon-shape loop filter, and the first filter is one of a 7-tap 5×3 cross-shape loop filter or an 8-tap 5×4 cross-shape loop filter.
17. The apparatus of claim 12, wherein a shifting parameter value of the first filter is the same as a shifting parameter value of the second filter.
18. The apparatus of claim 17, wherein the first filter comprises N first clipping operation, the second filter comprises N second clipping operation, and N is an integer greater than or equal to one.
19. The apparatus of claim 12, wherein the first filter comprises N first clipping operation, the second filter comprises N second clipping operation, and N is an integer greater than or equal to one.
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March 26, 2021
December 6, 2022
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